Nrog rau txoj kev loj hlob ntawm tib neeg thiab kev loj hlob sai ntawm peb lub teb chaws kev lag luam, hauv tsev hauv tsev, kev txhim kho hauv tsev sai dua thiab sai dua. Tsis tas yuav hais, kev ua lag luam kev ua lag luam ntawm peb li asphalt sib tov nroj tsuag tseem maj mam nce zuj zus. Ntau tus neeg siv thiab cov tuam ntxhab pom kev ua lag luam muaj peev xwm hauv kev lag luam no. Twb tau nqis peev. Yog li ntawd, hauv cov txheej txheem no, kev xaiv ntawm chaw tsim chaw yog qhov tseem ceeb heev. Qhov chaw nyob ntawm asphalt sib tov cog yog ncaj qha rau nws lub sijhawm ua haujlwm ntev.

Feem ntau hais lus, muaj peb feem ntau xaiv xaiv qhov chaw tsim kho tsim nyog rau Asphalt sib tov cog. Qhov uas tus neeg siv yuav tsum tau paub txog cov lus qhia ntawm kev siv tsev kawm ntawv. Txij li thaum lub tsheb thauj mus los deb ntawm raw asphalt ncaj qha cuam tshuam zoo asphalt, thaum xaiv cov khoom siv asphalt, qhov chaw nyob ntawm cov chaw nyob Asphalt, qhov chaw nyob ntawm cov chaw nyob ua ke yuav tsum yog qhov kev xav tau ntawm lub xaib kom tiav. Cov chaw tsim khoom tseem yuav tsum tau paub meej tias kev faib tawm asphalt raws li kev siv duab kom kwv yees li ntawm asphalt sib tov khoom siv tau.
Qhov thib ob yog tias cov chaw tsim khoom yuav tsum tau tswv thiab nkag siab cov ntsiab lus ntawm asphalt tov khoom siv, hluav taws xob thiab pem teb qhov yuav tsum muaj thaum lub sijhawm asphalt sib tov khoom.
Qhov kawg ntawm kev them nyiaj rau yog ib puag ncig ntawm kev siv tsev kawm ntawv. Lub chaw nres tsheb asphalt sib xyaw ua ke nrog kev ua haujlwm siab, yog li cov hmoov av, suab nrov thiab lwm yam kuab paug thiab lwm yam kev ua haujlwm yuav muaj hnyav dua. Yog li ntawd, thaum xaiv lub chaw tsim kho, cov tsev kawm thiab cov pab pawg nyob hauv tsev yuav tsum zam kom ntau li ntau tau. Txo cov kev cuam tshuam rau ib puag ncig ib puag ncig.